Point to be noted :-

1. Language gaps would not impact a connection order.

2.In a manual exchange, subscriber needs to communicate with the operator and a common language becomes an important factor.

3.The two method for the mechanism to transmit the identity :

    a) Pulse Dialing

    b) Multifrequency Dialing

4. It is possible to maximize the amount of calls made during a specified time.

5. It is easy to make calls regardless of the demand on the machine or the time of day.